[1] He served as Sangi (Associate Counselor) in the Imperial Court.

Fusasaki was a Sangi (associate counselor) in the Daijō-kan.[2] He founded the temple of Sugimoto-dera in Kamakura in 734 with the priest Gyōki (668–749).

The temple's legend holds that Empress Komyo (701–760) in the Nara Period (710–794) instructed Fusasaki, the then high-ranking minister, and a famous priest named Gyoki (668–749) to build the temple enshrining a statue of Eleven-Headed Kan'non, or Ekadasamukha in Sanskrit, as the main object of worship.

Priest Gyoki fashioned the statue himself because he was also a great sculptor.

[3] Fusasaki and his three brothers died during a major smallpox epidemic in 737.